反应详情

温度

160 °C

To a mixture of 2-(4-((3-chloropyrazin-2-yl)oxy)piperidin-1-yl)quinoline (see PREPARATION P2.1; 0.34 g, 1.0 mmol) and piperazine (0.83 g, 1.0 mmol) and K2CO3 (0.27 g, 2.0 mmol) was added i-PrOH (2 mL) and water (0.5 ml). The solution was heated to 160° C. under microwave for 5 hours. Then the mixture was concentrated and extracted with EtOAc (2×20 mL). The combined organic extracts were washed with water (10 mL) and brine (10 mL), dried over Na2SO4, and filtered. The filtrate was evaporated in vacuo and the residue was purified by flash column chromatography on silica gel (20% to 60% EtOAc in petroleum ether) to give the title product (0.11 g, 0.30 mmol, 30% yield) as white solid. ESI-MS (M+1): 391 calc. for C22H26N6O 390.

1. concentrationThen the mixture was concentrated
2. extractionextracted with EtOAc (2×20 mL)
3. washThe combined organic extracts were washed with water (10 mL) and brine (10 mL)
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. customThe filtrate was evaporated in vacuo
7. customthe residue was purified by flash column chromatography on silica gel (20% to 60% EtOAc in petroleum ether)